Skiving machine



Dec. 30, 1930. v 5. J. PENTLERET AL 1,787,052

SKIVING MACHINE Filed July 11, 1929 2 Sheets-Sheet 1 Dec. 30, 1930.

s. J. PENTLER ET AL 1, ,05

SKIVING MACHINE Filed July 11, 1929 2 Sheets-Sheet 2 Patented Dec. 30, 1930 UNITED STATES PATENT OFFiCE SIGMUND J". PENTLER AND OTTO B. SHORT, F WAU'SAU, WISCONSIN SKIVING MACHINE Application filed July 11,

This invention pertains to skiving machines, and more particularly to a machine for skiving the outturned upper of a stitchdown shoe after inseaming and prior to attaching the outersole.

In conventional structures of stitch-down shoes, the outer edge of the upper extends to the outer edge of the welt and the outsole, which renders the same visible, giving a cumbersome, heavy appearance to the sole that is particularly objectionable in light shoes, especially for women and children.

Due to the fact that the upper is turned outwardly subsequent to the inseaming operation, as disclosed in Patent No. 1,448,417 considerable difiicultyhas been encountered in skiving the edge of the outturned upper, so that the same is not visible between the welt and outer sole in the completed shoe. I It is, therefore, the primaryobject of the present invention to provide a simple, inexpensive, and efficient machine for uniformly skiving the outer edge of a shoe upper by ordinary, unskilled labor.

Incidental to the foregoing, a more specific object of the invention resides in the provision of a machine of the foregoing character in whichall of the operable parts are V i readily adjusted to the work to provide for any depth cut or angle desired.

A stillfurther object resides in the provision of means adapted to securely hold and create a tension upon the outturned edge of the upper as the same is skived through the action of a reciprocative knife.

With the above and other objects in view, which will appear as the description proceeds, the invention resides in the novel con- 4 struction, combination and arrangement of parts substantially as hereinafter described, and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claims.

a In the accompanying drawings is illustrated one complete example of the physical embodiment of the present invention constructed according to the best mode so far 1929'. Serial No. 377,553.

devisedfor thepractical application of the principles thereof. s y

In the drawings, Figure l is an elevation of a machine constructed in accordance with the present invention;

Figure 2 is a plan View of the same;

Figure 3 is a vertical section taken on the line 3-3 of Figure 1;

I Figure 4 is a detail section line 44 of Figure 1; j I

Figure 5 is a fragmentary section taken on the line 55 of Figure 1; and

Figure 6 is a fragmentary section of a shoe illustrating the mode of operation of the machine.

-Referring now more particularly to the accompanying drawings the numeral 1 designates a base provided with a supporting standard 2 which carries the operative mechanism hereinafter described.

As best illustrated in Figure '1, the supporting standard 2 projects vertically and laterally from the base 1, and adjacent its outer extremities is provided with vertical guideways 3 between which an adjustable plate 4 is slidably mounted for vertical movement. As best seen in Figure 3, the plate 4 is attached to the arm 2 by means of bolts 5 passing through the arm and through the vertical slots 6 provided in the plate. Thumb nuts 7, threaded upon the ends of the bolts taken on the 5, serve to lock the plate 4 in adjusted position. A thumb screw 8, carried by the boss 9 projecting from the arm 2 and threaded into an oifset ear 10 carried by the plate 4, serves to adjust theplate with relation to the arm 2 when the thumb nuts 7 are loosened. w

Pivotally secured to the plate 4 adjacent its lower end is a guide block 11 provided with a horizontal dovetail groove 12 in which is slidably mounted aknife arm 13. The block 11 is secured to the plate 4 by a threaded stud 14 passing through the plate and secured thereto by a thumb nut 15. A, pair of thumb screws 16 threaded into the flange 17 projecting from the lower edge of the plate 4, and positioned upon opposite sides of the pivotal axis of the guide block 11, serve to adjust the angular position of the guide block, after which the same is securely locked in adjusted position by turning down on the thumb nut 15.

Secured to the knife bar 13 and projecting through a slot 16 formed in the face of the block 11 in alignment with the groove 12 is a stud 17 which receives one end of a crank. rod 18 the same being retained on the stud by means of a nut 19' threaded upon its outer end.

As best shown in- Figure 1, the outer end of the knife bar 13 is slotted for the reception of a knife blade 20, which is locked within the slotted end of the knife bar by a set screw 21. The outer-end of the knife blade 20 is slidably guided in the slotted end of a: supporting arm 22 projecting from the guide block 11.

The opposite end of 'the connecting rod "18' is secured toa pitman 23 having a shaft extension 24 j ournalled within suitable bearings provided in the standard 2. Mounted on the shaft 24- is a belt pulley 25 connected with a drive pulley 26' by the belt 27. The

pulley 26 is mounted on a transverse shaft 28 journalled in the bearing brackets 29 canied by the base 1, and as best seen in Figure 2, the shaft 28 has secured thereto a belt pulley 30 which is connected with any suitable source of power through the belt 31.

From the foregoing explanation considered in conjunction with the drawings, it will be apparent that as the pitman 23 is rotated through its driving connection, re ciprocative movement will be imparted to the knife blade 20, which performs the skiving operation, as will be more fully described. I

Cooperating with the skiving blade 20 to support the work as the blade performs the skiving operation, is an anvil 32 which is adjustably secured to the supporting standard 2 between the horizontal guideways 33 by a screw 34 passing through a horizontal slot 35 formed in the inner end of the anvil.

Pivotally securedto the standard 2 is an arm 36 formed in two sections having a slotted connection to provide for longitudinal adjustment. The outer end of the arm carries a tension roller 37 which engages the work in cooperation with the anvil 32 to hold the same and create a tension thereon during the skiving operation, as will be described in more detail in connection with the operation of the machine.

-The roller 37 is provided with an offset sheave 38 connected with a driving sheave 39, secured on the driven shaft 28, through the belt 40. 7

Referring to Figures 1 and 4, itwill be seen that the vertical position of the roller 37 with relation to the anvil 32, is regulated by means of a supporting arm 41 adjustably mounted in the boss 42 projecting from the supporting standard 2. A thumb screw 43 serves to lock the arm 41 in adjusted position.

Referring to Figure 6, which illustrates one class of work to which the present invention is applicable, the numeral l i designates a shoe upper attached to an insole 4:5 by the conventional inseam stitches 46, which stitches also secures the welt strip 47. As heretofore explained, the edge l8 of the upper is turned outwardly prior to attaching the outsole in the usual manner of stitch-down shoes.

In the present illustration where it is desired to ski-ve the outturned edge of the upper 48 in order that the same will not be visible between the welt and the outsole in the completed shoe, the welt and outturned edge of the upper are placed upon the anvil 32, as illustrated, and are securely held upon the anvil by means of the roller 37, the periphery of which is indicated by the dot-and-dash line A. The drive of the roller 37 is such that it travels in the direction of the arrow,

causing a tension to be exerted upon the out-- turned edge of the upper as the 'skiving knife is-reciprocated upon the same along the dotand-dash'line B, which operation skives' the outturned edge of the upper to a feather edge adjacent the outer edge of the welt strip 47. Obviously, when the outsole is attached, the edge of the upper will not be visible in the completed shoe. Inaddition to holding the work and creating a tension thereon, rotation of the roller 37 also permits the work to be continuously and manually fed across the anvil by the operator until the entire marginal edge of the upper has been skived, it being understood that the end of the anvil 32 engaging the upper 44: serves as a definite guide for the work, which eliminates thev necessity for skilled labor. p

Inasmuch as thework to be operated upon varies both in thickness and width of the surface to be. skived, the various adjustments heretofore described have been provided which allow the angle of the knife with relation to the anvil, to be regulated as desired, by merely adjusting the angle of the guide block 11. Also,to compensate for various widths of material, the knife is raised by a vertical adjustment of the plate 4;, and at the same time, thevertical position of the roller 37, with relation to the working end of the anvil,

is regulated by vertical-adjustment of the supporting arm 41, which raises or lowers the arm 36.

As heretofore described, the anvil 32 is capable of horizontal adjustment with relation to the skivingknife 20 to regulate the width of the skiving cut. Also, the roller 37 is adjustable horizontally in order that the same will effectively cooperate with the anvil 32 to engage varying widths of work adjacent the free edge, whereby the same is not only litl securely held during the skiving operation, but the desired tension created thereon.

From the foregoing, it will be quite apparent that a comparatively simple and inexpensive machine has been provided, which will efiiciently skive various classes of work, and which, through the adjustment of the various operative parts, provides for various angles of cut and is readily applicable to work of varying thickness and width. Because of the simplicity of the machine, and the fact that the desired cut is obtained through adjustment of the operable parts, and the work is at all times definitely guided, it will be readily appreciated that unskilled labor may be employed in the operation of the machine, thus materially reducing manufacturing costs.

While the invention has been illustrated and described as applicable to a specific class of work, it will be understood that the same is intended to include other classes of work in which similar problems are encountered.

We claim:

1. A skiving machine comprising a base, a standard carried by said base, a plate adjustably carried by said standard, a guide block having a pivotal connection with said plate, means for adjusting the angle of said guide block, a reciprocative knife having a slidable connection with said guide block, an anvil adjustably carried by said standard, a pivotal arm carried by said standard, means carried by said standard for supporting said arm, and a driven roller carried by the free end of said arm and cooperating with said anvil to hold the work material and creating tension upon the same during the skiving operation.

2. A skiving machine comprising a standard, a plate adjustably carried by the standard, a guide block having pivotal connection with the plate, a reciprocative knife having slidable connection with said guide block, an anvil adjustably carried by said standard, and a driven roller adjustably mounted upon said standard and cooperating with said anvil to hold the work material and create tension upon the same during the skiving operation.

3. A skiving machine comprising a supporting standard, a plate adjustably carried by the standard, a guide block having pivotal connection with the plate, an inturned flange at the lower end of the plate, spaced adjusting screws carried by the inturned flange and operatively engaging one side of the block for adjusting the angle thereof relative to the standard, a reciprocative knife having slidable connection with the guide block, an anvil adjustably carried by the standard, and a driven roller adjustablymounted upon the standard and cooperating with the anvil to hold the work material and create tension upon the same during the skiving operation.

4. A skiving machine comprising a stand ard, an anvil adjustably supported upon the standard, a plate adjustably carried by the consin.

SIGMUND J. PENTLER; OTTO R. SHORT. 

